jersey RESTful api 在使用 FormDataMultipart 时回复 415 unsupported media type

Question

我正在使用 jersey 2.22.1 在 java 中构建一个 RESTful API。我有一个资源类，我打算在其中接收客户端将通过表单上传的文件。我的问题是我不断从服务器收到 415 不支持的媒体类型响应。有趣的是，客户端（Postman chrome 扩展）收到状态 0，当文件为 jpg 图像时连接到服务器时出错

资源类中还有另一个用于测试目的的方法，它工作得很好。我用谷歌搜索了 stackoverflow 网站，可以找到类似的案例，但对我的案例没有帮助。感谢所有帮助，在此先感谢。

资源类

package org.sime.seven.managefiles.resource;

import javax.ws.rs.Consumes;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;

import org.glassfish.jersey.media.multipart.ContentDisposition;
import org.glassfish.jersey.media.multipart.FormDataBodyPart;
import org.glassfish.jersey.media.multipart.FormDataMultiPart;

@Path("files")
public class UploadResource {

    @GET
    @Path("test")
    @Produces(MediaType.APPLICATION_JSON)
    public String test(){
        return "testing 1,2,3";
    }

    @POST
    @Path("upload")
    @Consumes(MediaType.MULTIPART_FORM_DATA)
    @Produces(MediaType.APPLICATION_JSON)
    public Response uploadFile(FormDataMultiPart formData){
        FormDataBodyPart filePart = formData.getField("file");
        ContentDisposition fileHeader = filePart.getContentDisposition();
        String fileName = fileHeader.getFileName();
        String reply = "File confirmed" + fileName;
        return Response.status(Status.OK).entity(reply).build();
    }



}

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">

            <modelVersion>4.0.0</modelVersion>

            <groupId>org.sime.seven</groupId>
            <artifactId>managefiles</artifactId>
            <packaging>war</packaging>
            <version>0.0.1-SNAPSHOT</version>
            <name>managefiles</name>

            <build>
                <finalName>managefiles</finalName>
                <plugins>
                    <plugin>
                        <groupId>org.apache.maven.plugins</groupId>
                        <artifactId>maven-compiler-plugin</artifactId>
                        <version>2.5.1</version>
                        <inherited>true</inherited>
                        <configuration>
                            <source>1.7</source>
                            <target>1.7</target>
                        </configuration>
                    </plugin>
                </plugins>
            </build>

            <dependencyManagement>
                <dependencies>
                    <dependency>
                        <groupId>org.glassfish.jersey</groupId>
                        <artifactId>jersey-bom</artifactId>
                        <version>${jersey.version}</version>
                        <type>pom</type>
                        <scope>import</scope>
                    </dependency>
                </dependencies>
            </dependencyManagement>

            <dependencies>
                <dependency>
                    <groupId>org.glassfish.jersey.containers</groupId>
                    <artifactId>jersey-container-servlet-core</artifactId>
                    <!-- use the following artifactId if you don't need servlet 2.x compatibility -->
                    <!-- artifactId>jersey-container-servlet</artifactId -->
                </dependency>
                <!-- uncomment this to get JSON support -->
                <dependency>
                    <groupId>org.glassfish.jersey.media</groupId>
                    <artifactId>jersey-media-moxy</artifactId>
                </dependency>

                <dependency>
                    <groupId>org.glassfish.jersey.media</groupId>
                    <artifactId>jersey-media-multipart</artifactId>
                </dependency>

            </dependencies>
            <properties>
                <jersey.version>2.22.1</jersey.version>
                <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            </properties>
        </project>

resulting jars

Answer 1

我发现，如 cmets 中所述，要使用 jersey 中的 FormDataMultipart 类，需要注册 MultipartFeature

所以我在 web.xml 中添加了 init 参数，如下所示

<init-param>
            <param-name>jersey.config.server.provider.classnames</param-name>
            <param-value>org.glassfish.jersey.media.multipart.MultiPartFeature</param-value>
</init-param>

而且效果很好。